James teeguetha



(No Model.)

J. TREGURTHA. TELEPHONE SWITGH.

No. 289,321. Patented Nov. 27,1883.

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JAMES TREGURTHA, OF` MALDEN, ASSIGNOR, BY lVlESNE-ASSIGNMENTSyTO THE ADJUSTABLE TELEPHONE SUPPORT COMPANY, OF BOSTON ,'MASS.

'I TELEPHONE-SWITCH.

SPECIFICATION' forming part of Letters Patent No.. 289,321, dated November 2'?, `1883,

Application filed May 14, 1:'83. (No model.)

To all whom zt may concern;

Beit known that I, J Anas Tnncun'rim, of Malden, in the county of Middlesex and St ate of Massachusetts, have invented certain new and useful Improvements in Telephonie Switches, of which `the following is a full, clear, and exact description.

. In this invention, in substance, as it is best `to employ it, and as it is particularly illustrated in the drawings and hereinafter described, the telephonie receiver at all times, and whether in or out of use, is carried by an arm arranged to be moved forward and backward upon another arm or support therefor, and this moving arm and its support and con necting mechanism `make the telephone-switch of thisinvention, and the attachment of the receiver to said moving arm is more al matter a of convenience than of necessityin the opera- ;O tion and use of the switch, as will hereinafter fully appear. y

The support forthe moving arm of the switch carries a series of studs or posts, all insulated therefrom, but" connectedwith the call and 2 5 telephonie circuits, and said moving, arm is linked or connected to a switching lever or plate, but insulated therefrom, and it and said switching-lever are arranged and adapted in such amanner that a movement of said arm 3o in one direction, and in that direction against a spring, so operates said switching-lever as 4through it/to disconnect the callcircuit from the main line, being in the receiver and sec- 1 ondary circuit of the transmitter, and at the same time complete the primary local circuit Y of the transmitter, while a movement of said arm in the other direction, and in that direction from `a reaction of said spring, cuts out the receiver and secondary circuit of the trans- 4@ mitter and restores the call-circuit.

` This invention, `in addition to the above, con- `sists of other improvements, which will here ,'inafter fully appear.

In the accompanying plate of drawings `a 4. 5 telephonie switch of the present improved construction is illustrated in connection with a `stand for telephonie instruments ofthe construction and arrangement of parts such as ,ffully shown and described in my application 5o`lf`r.Letters'Patent filed March 26,1883; butit is not intended to limit this invention thereto, for, as will appear from the description in detail which follows, it is capable of application to standsof other construction and-arrangement of parts-as, forinstance, to the box containing the call mechanism of the telephone; and in the drawings-- Figure lis a plan View of the telephone switch and its sta-nd. Fig. 2 isa side elevation'inone part broken out and in vertical sec- 6o tion. Fig. 3 is a horizontal section and plan View enlarged, as will appear hereinafter. Fig.

4 "is a longitudinal vertical section on line 4t 4, Fig. 3. Fig. 5 is a transverse vertical section on line 5 5, Fig. 3. Fig. 6 isa transverse 65 vertical sectiomenlarged, on line 6 6, Fig. l. Fig. 7 is a plan View, and Fig. S is a longitudinal vertical section `on line 8 8, Fig. 7, illustrating a modification. Fig. 9 is a diagram in illustration of the improved tele- 7o phonic switch, with the wirefconneetions-for primary and secondary circuit through the transmitter and receiver, anda call,main line, and local-battery circuits. Fig. 10 is a vertical section, and Fig. l1 is a plan View in detail, to behereinafter particularly referred to.

In the drawings and diagram, A is the telephonie transmitter, B the telephonie receiver, G a local battery, D a magneto-machine, and E call-bells, and each and all of any of 8o the usual constructions and arrangements of parts, and therefore needing no particular description herein. i

The body portion of the receiver B is surrounded by clamp-ring F2, in two parts, hav 85 ing ear-pieces a a, by which it is secured' by screws `to an outer lift, cl, of ahi'nge composed of three lifts or leaves, d, c, and j', joined together by a common axial bolt, and the outer lifts, d and f, joined to each other by an in- 9o terlocking pin, g, all so that the outerlifts can turn as one and the middle lift can turn of itself` upon the axial bolt, and eaclr of such turnings be independent of the other. Said middle lift, e, of the hinge `aloovedeg5 scribedis connected to theouter lift, L, of another hinge, which is in three leaves, c,"^l,and m, similarly connected and turning in its several lifts, but arranged to work in a planei at an angleto the hinge first described, andfthis` 'Ico second hinge is connected by its middle lift, Z, to an arm, F, which, between its two ends, has a fulcruin, It, in another arm, G, and is thus adapted to be swung forward and backward upon said latter arm. The supportinganxn G is carried by hinges arranged at :pi angle to each other, and each hinge is in three lifts, n, q, and i', of similar construction to the hinges previously described, and one of them is connected to the upper end of a vertical standard or rod, H, which is carried at the outer end of the horizontal continuation J of a vertical rod, K, arranged to be adjusted as to` height and to be swung around a center, and i'or attachment to a vbench or other suitable fixture, all, except as to the swing of the arm F, carrying the receiver upon the supporting- "arm G therefor, as fully described and shown inthe application aforesaid, and which, as it for-'ms no part ot' the present invention, it is not deemed necessary to herein more particula'rly describe. rlhe swing of the receivercarrying arm F is in a plane coincident with it's longitudinal axis and parallel with the same axis of its supporting-arm G, and its part L, extending beyond the fulcruni l1, passes in said swing of the arm Facross the supportingarm G.

The supporting-arm G is provided with iive studs or posts, marked with figures 1, 2, 3, 4,

and 5, respectively, stud or post 1 being situated between studs 2 and 3, which are alongside and separated from each other, and studs 4 and 5 alongside of and separated from each other.- Each of the. studs 1 2, 3, 4, and 5 is made of metal or other material suitable for an electric conductor. Again, each is suitably constructed for the attachment of an electric conducting-wire, and they areseverally insulated from the support G by a common plate or stand, A, ot' insulating. materialsuch as hard vulcanized india-rubber-which is attached to said support in any suitable manner, and, except ashereinai'ter described, said studs and posts have no4 electric communication with each other. The wire-connections between these several studs 1, 2, 3, 4, and 5 4and a ltelephonie receiver, B, a t-elephonic transmitter, A, local "battery (l, bells E, magneto-machine D, ground at M and N, and main line-'O are shown in the diagram. These wires consist of a wire, l?, connecting stud 1 'with the inain line O; awire, Q, connecting stud 2 with bells E, magneto-machine D, and

`ground at M 5 ya wire, R, ruiming from stud 3 into and out ofthe receiver E, and thenceinto 'andout of the transmitter A to the ground at N; a wire, S, ruiming from one pole of the local battery C to the primary coil of the trans- `initt`er, thence by a wire, T, to stud 5, and by awi'rc, U, from stud 4to the other pole of said batter-y.

B2 4is an arin attached to and insulated i'rom the'swinging arm F, and interlocking at its endt withthe notch a of a horizontal switching-plate, Ci, turning upon a fulcrum-pin, c,

' esami of the block or plate A,ofnsulating material. The switching-plate Ct is made` of metal or other suitable electric conducting niateriahand it passes between the studs or posts 2, 3, 4, and 5 and along its two edges, as at w, x, y', and z. lt is shaped so that if the receiverarm F be swung upon its fulcrum 7L in one direction the switching-plate CJ being, operated thereby) the part c of said switching-plate will come into contact with the side oi' stud or post 2, and its other parts-to wit-,10,1% and x-be placed out of the. direct contact, respectively, either with the posts or studs 3, 4, and

v5, or with metallic or other electric conduct-- ing plates or surfaces a?, attached to said studs 0r posts, as shown, and so that if the receiverarm F be swung upon its ,fulcruni in the opposite direction (the switching-plate being operated thereby) the part fw ot' said switchingplate Cl will come into direct contact with the side of stud or post 3, the party with the side of post 4, and the partx with the side ofpost 5, or in the case oicach of said posts or studs, as is particularly shown in the drawings, into contact with the metal plate or surface c2, attached thereto, respectively, by riding or passing over the same, and the part z of said switching-plate will be placed out of contact with the stud or post 2. Stud or post 1, as shown in Figs. 1, 2, 4, 5, and 6, has an extension or arm, if, ot' metal or other suitable electric conducting material, which is shaped at its'V end to rest with a yielding pressure upon, and

`thus'nnake contact with, the upper surface of the metal switching-plate C2. This post or stud 1, as shown in Figs. 7 and 8, makes the fulcrum c for the switching-plate G2, and thus it is in contact therewith, dispensing with the necessity of the extension or arm b", above described.

The. several wire-connections between the several studs or posts 1, 2, 3, 4, and 5 .and the receiver B, transmitter A, local battery C, bells E, magneto-machine D, ground at M and N, and main line Oare, as usual, and together with a switching-plate of the construction, arrangement, and operation shown'and described as to contact between its parts fw, w, y, and z and said studs or metallic plates or surfaces t connected therewith, and together with a metal connection, either by the extension ,or arm b or by the post 1 between said switching plate C2 and said post 1, established, first, with the switching-plate C2 in .contact with stud 2 and said switching-plate out of contact with studs 3, 4, and 5, the call-circuit with the main line-that is, from main line O along wire P to stud 1 in the direction of thearrows marked with iigure 1, and thence through stud 2 along wire Q in the direction of the ar- IOO IIO

rows marked with iigure 2 to the bells E, magstuds-and said.` switching-plate in contact main line O-f-that is, from mainline O along wire P in the direction of the arrows marked .with stud 3, the ltelephonie circuit-.with thef ywith the figure l to stud l, andthrough said` stud l to and through stud 3, and thence by .wire R inthe -direction ofthe arrows marked withfgure 3, to and through the receiver and u transmitter, and from thence to the ground;`

and, also, they then establish another circuit by wire T from the primary coil of the trans-` mitter to and through stud 5, and from thence by the Switching-plate G2, through stud 4 and wire U and both poles ot' local battery C and wire S, with the transmitter A, thus completing the circuit between the transmitter A, receiver B, and local battery C.

When, by bringing switching-plate C2 into contact with stud'2, the call-circuit is est-ablished, the telephonie and other circuits above .circuitis broken, and either of th ese two classes `ofcircuits is established, as the case may be, by swinging the arm F in the one or the other direction upon its fulcrum 71., and through the swing of said arm swinging the switchingplate C2; and these operations obviously are each capable of" being accomplished without removal of the receiver from said arm F-or,` Vin .other words, from its support-and either `by pressure upon the arm F from the hand of the user or from the rest of the ear ofthe user against the receiver when being used. The carrying-arm F for the receiver has a spring, XV, coiled aroundits fulcrum-pin h within the shell or tubularH casing X `of the support G, surrounding said pin,.and one end of said spring is attached to said fulcrum-pin h and the other end to said casing, all as plainly shown in Fig. 2 of the drawings. This ar- -rangement of the spring is such that the movement of the receiver-arm F in the one direc- Ur A tion, as herein described, to break the callcircuit and establish the telephonie and other circuits will be-against said spring, and that the movement ot' said arm in the other direction, as herein described, to establish the calli circuit and break the telephonie and other circuits will be from the reaction of said spring,

whereby, as is apparent, all liabilityof the call-circuit being accidentally left broken or Vcut out when ceasing to use the telephone or when it is not being usedis obviated, absolutely. g

The supporting-arm G for the receiver-car- .rying arm Fhas a fender or guard, Y, pro- `iecting therefrom on opposite. sides of the receiver-carrying arm F, and in position to respectively abut against said arm Fas `it is swung` to make the contacts described between the switching-plate G2 and the studs or posts V2, 3, 4, and 5, and at the time such contacts-are made, and .thus by` such abutmentsthereof prevent any undue strain or pressure between the switching-plate and the studs when contact is made by them either for the call-circuit or for thetelephonic and other circuits herein described. These fenders` or guards Y may be upon the swinging arm F, in lieu of. upon the supportingarm G, as 'particularly shown and described. It desired, the carrying-arm F for the receiver, together with the supporting-arm G therefor, may be arranged for the one to have a rectilinear movement upon the other, instead of a swinging movement, as has been herein particularly described and shown.

The studs'or posts 4 and 5 may be dispensed with, thus dispensing with the local-battery and other circuits established through them with the switching-plate C2 in contact therewith; but it is preferable, for obvious reasons, to employ them.

The parts w, .r, and 1/ of the switching-plate -C`, making the electric connections between said plate and the posts or studs 3, 4, and 5 and securing the establishment of the telephonie and other circuits, as has been .described, are each shaped, together with the metal plates a2 of said posts belonging to them all,as shown, so that contact will be maintained at or insured between said parts of the switching-plate and said plates a2 of the posts until the switching-plate has almost, in fact, reached the extreme limit of its swing to break said telephonie and other circuits, the advantage roo of which is obvious in the use of the receiver and transmitter, as it allows the rest of the ear against thereceiver to be relieved either accidentally or intentionally as it and the transmitter are being used without necessarily breaking the circuit previously establish ed for their being used.' Y.

A great advantage ofthe present improved telephonie switch is in the fact that, as all the wire-connections are made with studs upon the support G and with no stud or studs upon the receiver-carrying arm F2, there is no danger ofthe wires becoming entangled or interfering in any way with the use of said arm; and, again, it allowsthe posts to be boxed or cased, thus `protecting them against liability of injury from any cause whatever. i In Figs. l() and 1]., a* is a horizontal rod tha passes through and from side to side ofthe Ablock A2, supporting or carrying binding-post l and other posts, and also that passes` across and at its middle and cam or eccentric portion IfL in contact with the under side of the extension or finger piece b2, hereinbefore described, and making the electric connection between said post l and the switching-plate C.V This eccentric b* and rod a* are arranged to be turned freely fwithin said block A2, and, for convenience in turning them, the rod has at `one of its projecting ends a milled head, di and it is shouldered at both projecting ends, to hold it IIO ,l l A l,

l l :asasei a-s-.it is turned against escape from said block. This eccentric b* is shaped so that, turned in one direction partially around, it will, by working against the under side of said extension b2, lift said extension sufiiciently to break its rest upon and electric connection with said switching-plate G2, and also hold it thus lifted as long as said eccentric remains stationary and in such position relative to its said extension, when, by continuing to turn the eccentric in the same direction, it will allow said extension b2 to drop or move to its said rest and bearing upon said switching-plate,re-establishing electric connection between said switching-plate and post .1, which may be continued so long as said eecentric then remains in such position relative to said extension.

An eccentric, bl', constructed and arranged and operating upon said extension b2 as above described, plainly permits, by a simple turning of it, the telephonie instruments to be at any time instantly and completely put out of and into electric connection, thereby providing most efficient and ready means of making the instruments safe against accidents and casualities during electrical storms, and also during and at such other times as may be desired.

Vhile the arm F, making thelever, as it were, for operating the mechanism of the telephoneswitch, has been herein particularly described and shown as carrying the telephone-receiver, and with manifest advantages and conveniences, it is plain that the telephone-receiver `may be removed therefrom and be carried and supported independentlythereof, and without in the least degree affecting the operation of the switching mechanism by and from the movement of the switch arm or lever F upon its support. Therefore it is not intended to .limit this invention. in any respect to the fact that said arm F, as particularly shown and described, does carry said receiver, although, as is obvious, it is preferable that it should, and for that reason has been so particularly `shown and described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. An arm, F, adapted for a forward and backward movement upon a support, G, in combination with the studs 1, 2, and 3, applied to said support, and withthe switchingplate C2 upon said support, adapted to be operated by said moving arm, and insulated from said arm and support, but electrically connected with stud 1, and said studs 2 and 3,

with the calland'transmitter circuits, the latter circuits Yincluding the receiver, but all -i-,isulated from said support, whereby by moving through rsaidarm F said switching-plate inone direction the receiver and transmitter circuits will be established and the call-circuit b roken, and by similarly moving said switching-plate in the other and opposite di rection the receiver andl transmitter circuits will be cut out and the call-circuit established.

2. An arm, F, adapted for a forward and backward movement upon a support, G, and provided with a spring,V, in combination with the studs 1, 2, and 3, applied to said support, and with the switching-plate C2 upon said support, adapted to be operated by said moving arm, and insulated from said arm and support, but electrically connected with stud 1, and said studs 2 and 3, with the call and transmitter circuits, the latter circuit including the receiver, but all insulated from said support, whereby by moving through said arm said switching-plate in one direction against said spring the receiver and transmitter circuits will be established and the call-circuit broken, and by similarly moving said switching-plate in the other and opposite direction from the reaction of said spring the receiver and transmitter circuits will be cutout and the call-circuit established.

3.,An arm, F, adapted for a forward and backward movement upon a support, G, in combination with a fender or fenders or guards, Y, and with studs 1, 2, and 3,` applied to said support, and with the switchingplate C'-7 upon said support, adapted to be operated by said moving arm, and insulated from said arm and support, but electrically connected with stud 1, and said studs 2 and 3, with the call and transmitter circuits, the latter circuit including the receiver, but all insulated from said support, whereby by moving through said arm said switching-plate in one direction the receiver and transmitter circuits will be established and the call-circuits broken, and by similarly moving said switching-plate in the other and opposite direction thereceiver and transmitter circuits will be cut out and the call-circuits established, and in either or both of said movements,`through an abutment of said fender or fenders, said studs ,and switching-plate will be protected against und ue pressure and strain.

4t. An arm, F, adapted for a forward and backward movement upon a support, G, in combination with the studs 1, 2, 3, 4, and 5, applied to said support, and with the switching-plate C2 upon said support, adapted to be -operated by said moving arm, and insulated from said arm and support, but electrically connected with stud 1, and saidstuds 2 and 3, with the call and transmitter circuits,

the latter circuit including the receiver, and

said studs 4t and 5 connected with the circuit through a local battery, but all insulated from said support, 'whereby by moving through said arm F said switching-plate in one direction the receiver and transmitter and localbattery circuits will be established and the call-circuit broken, and by similarly moving said switchingplate in the other and opposite direction the receiver and transmitter and local-battery circuits will be cut out and the call-circuit established.

5. An arm, F, adapted for a forward and backward movement upona support, G, and provided with a spring, NV, in combination IOO with the studs 1, 2, 3, 4, and 5, applied to said support, and with the switching-plate C2 upon said support, adapted to be operated by said moving arm,and insulated from said arm and support,but electrically connected with stud 1, and said studs 2 and 3, with the call and transmitter circuits, the latter circuit including the receiver, and said studs 4 and 5 connected with a circuit through a local battery, but all insulated from said support,

' whereby by moving through said arm said switching-plate in one direction against said spring the receiver and transmitter and localbattery circuits will be established and the callcircuit broken, and by similarly moving said switchingplate iny the other and opposite direction from the reaction of said spring the receiver and` transmitter and local-battery circuits will be cut out and the callcircuit established.

6. The arm F, moving upon a support, Q, having studs 1, 2, and 3, electrically connected, substantially as described, in combination with a switchingplate, G2, electrically connected, as' described, with stud 1, and constructed at its parts w and z, and arranged to be operated by said arm F, and all so as to make contact with studs 2 and 3, substantially as and for the purpose described.

7. The arm F, moving on a support, G, having studs 1, 2, 3, 4, and 5,electrically connected, substantially as described, in. combination with a switching-plate, C?, electrically connected With stud 1, and constructed at its parts w, w, y, and z, and arranged to be oper- 3 5 ated by said arm F, and all so as to make contact `with studs 2, 3, 4:, and 5, substantially as and for the purpose described. i

8. An arm, F, moving upon a support, G, having studs `l, 2, and 3,electrieally connected, 4o substantially as described, in combination with a switchingplate, C2, operated by said arm F, and electrically connected to stud 1 through an extension or arm, bt', substantially as described, for the purposes specifiedl 45 9. An arm, F, moving upon a support, G, having studs 1, 2, and 3,electrically connected, substantially as described, in combination with a switching-plate, C2, operated by said arm F, and electrically connected to stud 1 through an extension or arm, b2, which is adapted to be placed into and out of said electrical connection, substantially as described, for the purposes specified.

In testimony whereof I have hereunto set 55 my hand in the presence of two subscribing Witnesses.

JAMES TREGURTHA.

Vitnesses EDWIN W. BROWN, WM. S. BELLoWs. 

